Abstract
Into the downtown place of the city of São Paulo it’s situed the Aclimação Park that since 1939 had been suffering a lot of modifications about urbanistic actions, there is a lagoon of 33.380 m² with eutrophic waters (rich in organic materials), provided with the local sewerage systems, nascents and pluvial waters. In Aclimação lagoon it had been described the presences o…